Where does the water go from a sink without plumbing?
Water drains passively through an outlet Ø24/32/40 mm into a bucket or canister under the sink or via a hose or pipe to wherever you direct it. The Pi-Pi sink has no built-in tank or pump: you supply the water from an external container. Models are in the plastic sinks catalog.
How drainage works without plumbing
The Pi-Pi sink is a passive wall-mounted bowl with a soap shelf. The bowl receives water while you wash your hands, and a hose fits onto the stepped outlet. Used water drains passively through the hose, without a pump. This is not a self-contained station with a tank and pump: you choose the water source, hose, and container, they are not included.
Water drainage options
- A bucket or canister under the sink: the simplest option for a garage, workshop, and garden cottage.
- A hose directed outside into a container.
- A pipe or other suitable drain if you have one.
The outlet is cut to the required step for your hose; how to do this is described in the response about connecting the drain.
Where to dispose of collected water
Water disposal rules depend on your site and municipality, so first check with your association, management company, or local services. If the water contains oil, paint, or solvents, handling rules are usually stricter. In a garage and workshop, it’s worth considering this in advance.
Where to get water if there is no tap
You provide the water supply:
- A container with a tap placed above the bowl level;
- A canister or barrel from which you manually pour water.
For a garden cottage, a raised rainwater barrel is suitable, for a workshop – a canister with a tap next to the sink.
Is a plumber needed
No. Installation takes 5–7 minutes: the sink is mounted on brick, concrete, wood, or a frame wall without special tools, and the drain is a hose on the outlet. The shape is your choice: straight or corner sink, which fits into the corner of a tight workshop or cottage.
In winter
In sub-zero temperatures, water in the hose and container may freeze: this is a property of water, not the sink. Therefore, after use, empty the hose and container. The LLDPE bowl itself does not crack in frost down to −40 °C. More details are in the response about the sink in a cold garage or allotment shed.
Suitable Models

Pi-Pi Standard
Closed-top body – the simplest way to add a standing urinal to a shed or cabin that doesn’t need a vent.

Pi-Pi Standard Plus
Top port Ø70 mm connects directly to the standard ventilation of a composting toilet – for a closed cottage, allotment, or campervan where ventilation is needed.

Pi-Pi Standard Corner
Corner shape plus top port Ø70 mm for ventilation – standing urinal even in the tightest cottage.

Pi-Pi Outdoor Sink
Durable plastic sink for cottages, garages, and workshops – shatterproof and frost-resistant. Comes with a soap shelf.

Pi-Pi Outdoor Corner Sink
The same durable plastic sink, but for corners – to save space in tight workshops or cabins.
Related Questions
Have Questions?
Got a question? Message me – I’ll help you pick the right model for your garden shed or toilet setup and sort out delivery. I respond within one business day.

Mart Tamm
Account Manager for United Kingdom
Have questions about products, pricing, or partnership? Email me directly – I’ll respond personally.